<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog"
            >添加分类</el-button
          >
        </el-col>
      </el-row>

      <tree-table
        class="treeTable"
        :data="cateList"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        index-text="#"
        border
        :show-row-hover="false"
      >
        <template v-slot:isok="scope">
          <i
            class="el-icon-success"
            style="color: lightgreen"
            v-if="scope.row.cat_deleted === false"
          ></i>
          <i class="el-icon-error" style="color: red" v-else></i>
        </template>

        <template v-slot:order="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag
            size="mini"
            type="success"
            v-else-if="scope.row.cat_level === 1"
            >二级</el-tag
          >
          <el-tag size="mini" type="warning" v-else>三级</el-tag>
        </template>

        <template v-slot:opt="scope">
          <el-button
            type="primary"
            size="mini"
            icon="el-icon-edit"
            @click="showEditCateById(scope.row.cat_id)"
            >编辑</el-button
          >
          <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeCateById(scope.row.cat_id)"
            >删除</el-button
          >
        </template>
      </tree-table>

      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[5, 10, 20, 50]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>

    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%"
      @close="addCateDialogClosed"
    >
      <el-form
        :model="addCateForm"
        :rules="addCateFormRules"
        ref="addCateFormRef"
        label-width="100px"
      >
        <el-form-item label="分类名称：" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类：">
          <el-cascader
            v-model="selectedKeys"
            :options="parentCateList"
            :props="cascaderProps"
            @change="parentCateChanged"
            clearable
            change-on-select
          ></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑商品分类的对话框-->

    <el-dialog
      title="编辑分类"
      :visible.sync="editCareDialogVisible"
      width="50%"
    >
      <el-form
        :model="editCateForm"
        status-icon
        :rules="editCateFormRules"
        ref="editCateFormRef"
        label-width="100px"
      >
        <el-form-item>
          <el-input v-model="editCateForm.cat_id" type="hidden"></el-input>
        </el-form-item>

        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="editCateForm.cat_name"></el-input>
        </el-form-item>
      </el-form>

      <span slot="footer" class="dialog-footer">
        <el-button @click="editCareDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 10
      },
      total: 0,
      cateList: [],
      addCateDialogVisible: false,
      editCareDialogVisible: false,
      addCateForm: {
        cat_name: '',
        cat_pid: 0,
        cat_level: 0
      },
      editCateForm: {
        cat_id: '',
        cat_name: ''
      },
      editCateFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ]
      },
      addCateFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ]
      },
      parentCateList: [],
      cascaderProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name'
      },
      selectedKeys: [],
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isok'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt'
        }
      ]
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: this.queryInfo
      })
      console.log(res)
      if (res.meta.status !== 200)
        return this.$message.error('获取商品分类失败！')
      this.cateList = res.data.result
      this.total = res.data.total
    },
    handleSizeChange(newsize) {
      this.queryInfo.pagesize = newsize
      this.getCateList()
    },
    handleCurrentChange(newpage) {
      this.queryInfo.pagenum = newpage
      this.getCateList()
    },
    showAddCateDialog() {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    async getParentCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: { type: 2 }
      })
      console.log(res)
      if (res.meta.status !== 200)
        return this.$message.error('获取父级分类数据失败！')
      this.parentCateList = res.data
    },
    parentCateChanged() {
      console.log(this.selectedKeys)
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid = this.selectedKeys[
          this.selectedKeys.length - 1
        ]
        this.addCateForm.cat_level = this.selectedKeys.length
        return
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    addCate() {
      this.$refs.addCateFormRef.validate(async valid => {
        if (!valid) return this.$message.error('数据校验失败！')
        const { data: res } = await this.$http.post(
          'categories',
          this.addCateForm
        )
        if (res.meta.status !== 201)
          return this.$message.error('添加分类失败！')
        this.$message.success('添加分类成功！')
        this.getCateList()
        this.addCateDialogVisible = false
      })
    },
    addCateDialogClosed() {
      this.addCateForm.cat_name = ''
      this.addCateForm.cat_pid = 0
      this.addCateForm.cat_level = 0
      this.selectedKeys = []
    },
    /* 显示编辑分类的对话框 */
    async showEditCateById(id) {
      const { data: res } = await this.$http.get('categories/' + id)
      if (res.meta.status !== 200) return this.$message.error('查询分类失败！')
      this.editCateForm = res.data
      this.editCareDialogVisible = true
    },
    /* 发起编辑分类的请求 */
    editCate() {
      this.$refs.editCateFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put(
          'categories/' + this.editCateForm.cat_id,
          { cat_name: this.editCateForm.cat_name }
        )
        if (res.meta.status !== 200)
          return this.$message.error('编辑分类失败！')
        this.$message.success('编辑分类成功了')
        this.editCareDialogVisible = false
        this.getCateList()
      })
    },
    /* 发起删除商品分类请求 */
    async removeCateById (id) {
      const confirmResult = await this.$confirm('此操作将删除商品分类, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        this.$message.info('已取消删除')
      } else {
        const { data: res } = await this.$http.delete('categories/' + id)
        if (res.meta.status !== 200) return this.$message.error('删除商品分类失败！')
        this.$message.success('删除商品分类成功了')
        this.getCateList()
      }
    }
  }
}
</script>

<style lang="less" scoped>
.treeTable {
  margin-top: 15px;
}
.el-cascader {
  width: 100%;
}
</style>
